“After joining the faculty at UCLA in 1948, Professor O'Donnell quickly became a leader in the newly developing field of management theory and policy. He taught the basic courses in this area. In 1955 the first edition of the textbook Principles of Management, coauthored with Professor Harold Koontz, was published by McGraw-Hill. This book synthesized an operational approach to the management of enterprises. By filling a long-felt need in colleges and universities, it soon became the outstanding college textbook on its subject.”